不同药剂对水稻飞虱防效评价

Evaluation of the Efficacy of Different Chemicals against Rice Planthopper

摘要: 受气候因素及药剂因素等多重因素的影响，南雄市水稻褐飞虱和白背飞虱的发生呈现上升趋势，为南雄市水稻安全生产过程褐飞虱和白背飞虱的有效防控筛选高效、低毒且对环境友好的防控药剂，选用了在粮食生产过程中常用的4种防控水稻褐飞虱和白背飞虱的化学药剂进行田间药效对比评价试验。试验结果表明，20%三氟苯嘧啶水分散粒剂对水稻褐飞虱和白背飞虱的防治效果在施药初期优于25%吡蚜酮悬浮剂和80%烯啶·吡蚜酮水分散粒剂的同时还表现出了良好的持效性，还具有较高的保产率，因此推荐作为南雄市水稻褐飞虱和白背飞虱防治的主力药剂，推荐施药浓度为最高浓度8 g/亩，为避免害虫产生严重耐药性，可与25%吡蚜酮悬浮剂和80%烯啶·吡蚜酮水分散粒剂轮换交替施用。

Abstract: The occurrence of rice brown planthopper and white back planthopper in Nanxiong City showed an increasing trend due to the influence of multiple factors such as climate and pharmaceutical factors, for effective prevention and control of brown planthopper and white back planthopper in the safe rice production process of Nanxiong City, efficient, low toxic and environmentally friendly prevention and control agents, four kinds of chemical agents used in the process of grain production to control rice brown planthopper and white back planthopper were selected for comparative evaluation of field efficacy. The test results show that the control effect of 20% trifluoropyrimidine water dispersing granule against rice brown planthopper and white back planthopper was better than that of 25% pyrhidone suspension and 80% endine-pyrhidone water dispersing granule at the initial stage of application, and also showed good durability, It also has a high yield guarantee rate. Therefore, it is recommended as the main agent for the control of rice brown planthopper and white back planthopper in Nanxiong City, recommended application concentration is the highest concentration of 8 g/mu. To prevent pests from developing serious resistance, it can be applied alternately with 25% pyrhidone suspension and 80% endine-pyrhidone water dispersible granule.